package com.atsongyr.springCloud.controller;


import com.atsongyr.springCloud.entity.CommonResult;
import com.atsongyr.springCloud.entity.Payment;
import com.atsongyr.springCloud.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.util.CollectionUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

/**
 * @author songyurui
 * @description 订单 消费端
 */
@RestController
@Slf4j
public class OrderController {
//    public static final String PAYMENT_URL = "http://localhost:8001"; // 服务方单机
    /**
     * 服务接口为集群，需要访问服务端在注册中心到名称
     */
    public static final String PAYMENT_URL = "http://cloud-payment-service";

    @Resource
    private RestTemplate restTemplate;

    @Resource
    private LoadBalancer loadBalancer;

    @Resource
    private DiscoveryClient discoveryClient;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> creat(Payment payment) {
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create", payment, CommonResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable Long id) {
        return restTemplate.getForObject(PAYMENT_URL + "/payment/get/"+id,CommonResult.class);
    }
    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable Long id) {
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL + "/payment/get/"+id,CommonResult.class);
        if(entity.getStatusCode().is2xxSuccessful()){
            return entity.getBody();
        } else {
            return new CommonResult<>(444,"操作失败");
        }
    }

    @GetMapping(value = "/consumer/payment/lb")
    public String getPaymentLB() {
        // 获取注册中心的服务
        List<ServiceInstance> instances = discoveryClient.getInstances("cloud-payment-service");
        if (CollectionUtils.isEmpty(instances)) {
            return null;
        } else {
            ServiceInstance serviceInstance = loadBalancer.instances(instances);
            URI uri = serviceInstance.getUri();
            return restTemplate.getForObject(uri+"/payment/lb",String.class);
        }
    }
}
